kubota M1-85DT hydraulic scheme

Hello,
I have a problem with my kubota M1-85 DT tractor.
Lately when I was using heavy loads (plow, sprayer ...), and
when I stop the engine, the load was going down.
To solve that problem, my usual workshop had changes some joints into the distributor.
Now I don't have that problem, but now I need to accelerate the engine at least to 1600 rpm to the load begin to rise (the same with heavy and light load).

Now the mechanic are not able to get that it start to rise at 600 rpm.

Someone has the workshop manual, or the hydraulic scheme for the M1 Kubota series?

Thanks in advance.

Best regards.

Hello,
Thank you very much for the answer, and I hope all goes well in this difficult COVID-19 moments!!.

Do you Know where can be located the pressure relief valve?.

I mesured the presure in a back quick plug with a manometer, and the pump gives 180 bar at 600 rpm and 185 bar at 2000 rpm, so I suposs that the pump are working good.

Best regards.

North Idaho Wolfman said:

You need to get the WSM (aka Service manual) and check the pressure relief valve settings.

I don't find a free or cheap copy to download.

Click to expand...

Hello,

My M1-85DT, is the same tractor that Kubota M8580, and very similar to the K1 series.
I realised that M1 series was selled only in Spain and Portugal.

Best regards.